Extension-bottom-box-wrapping apparatus



A. J. MORRISON.

EXTENSION -TOM BOX WRAPPING APPARATUS.

.AB TloN HLED SEPT. 26, 19:9.

1,348,369, l Patented Aug. 3, 1920.

UNITED STATES., PATIPQNTA OFFICE.

. ALFBEDJ. MORRISON, OF DENVER,ICOLORADO, ASSIGNOR'TOSTOKES &, SMITH COMPANY, OF SUMMERDALE, PHILADELPHIA PENNSYLVANIA, A CORPO# `RATION 0F PENNSYLVANIA., .v

EXTENSION-BUTTOM-BOX-WRABPING APPARATUS.

To all whom t may concern.'

Be it known that I', ALFRED J. MoRiusoN,

- a citizen of the United States, anda resident of the city of Denver and State of Colorado, have invented certain new 'and useful Improvements in Extension-Bottom- Box-lVrapping Apparatus, of which the following is a. specification.

Specification of Letters Patent. l Patented Aug .3 1920, Application ined september 2s, 191.9. serial No'. 326,508. 'i i wardly against the sides ofthe box topress. the 'wrapper vflaps into close Contact there'- with. Ak second'v set of parallel rollers located below .the .first set, similarly operates, von the two remaining sides of the box; but

as theiry operation is exactly thek same as that of the top pair ofy rollersit l,will not.Y

be described.

Rollers of this type may obviously be, used Y passing a shell with the glued wrapper attached to the bottoml thereof through a se#` Vries of operating elements;v but for the pur- "pose of illustration it, is disclosed as attached to a box covering machine of the whichfold in and press the parts ofthe wrapper against the sides and ends of the box and over its top edges in proper suceession,'so as toy cover the box completely e and press they glued wrapper evenly into place thereon.

This operation presentsA difficulties where the box is of lthe extension bottom type, since the wrapper must be pressed against the top of the extension flange before it is brought into contact with the adj acentside of the box; and as it is highly vdesirable to have the box in continuous motion dur# ing the operation, the device for wrapping invention' is to improve upon the general A type of mechanism.V disclosed therein kIn said patent parallel rollers. are longitudinally slotted to receive opposite extension bottom flanges of a box shell descending bottom first between the rollers with '.thei

glued wrapper blank attached to the bottom' of thefshell The edges of the extentype disclosed in the patent to Philip S. Smith, No. 691,329. j

.In this type of machine the box shell, with its attached cover blank, is registered on a thin platen corresponding in sizey to the extension bottom, and a form block con-` nected with 'a plunger rod is locatedl inside y the shell and moves downwardl against the yielding resistance of the platen, the relatively thin edges of the platen entering the slots in the wra ping rollers and protecting the extension anges from being broken thereby.

The 'roller vdisclosed in the abovementioned patent to Garrett has a longitudinal slot formed with straight, flat sides. Durp ing the wrapping operation theupper wall vof the slot which presses the wrapper into engagementvwith the upper face of the extension edge is practically pivoted about the outer edge of the extension as the roller vrevolves until it reaches `the position shown extension except at vthe edgel of the 'slot sion flanges in their descent feontact with Y the lower faces of the slots and rotate theV rollers inwardly toward the box," the slots being so proportioned that their upper edges wipe the opposite flaps ofithe .wrapper inwardly over the extension 'anges and into'jrcontactwith the upper 'side thereof, the continued motion of the box rolling the unbroken surface portion of the rollers up in Figure 4 of said patent. At'this moment. and' notV before, the' wrapper is pressed against the extension edge overa substantial portion ofitsY surface; butl a moment later the further` descent of thel box lifts the upper wall ofthe slot away from said Y wall, which slides inwardly into Vposition against the wall of the box. ltwillbe seen that vthe Vslot Vwall has practically a rocking motion about the edge of the'extension and the edge of the slotv as pivots, and is in substantial pressing engagement'with the wrapper and extension edge for onlya moment e 'during the operation.` VFurthermore, in the position of the rollers shown in Fig. 4 of said patent, the upper edge of each slot is necessarily above the center of the rollers.

is a decided resistance to this sliding movement tending to prevent the edge of the roller from passing 'completely into the angle between the extension flange and the sidewall of the box to make a clean, sharp bend inthe wrapper at that point, the resilient buffer located in the roller slot permittingthe ed e of the slot to be withdrawn very slightly rom the close contact which is necessary to press the wrapper `into proper position. This defect is accentuated by the fact that the box descends vwith considerable speed in the type of machine disclosed in the Smith patent, increasing Vthe tendency of the upper edge of the slot to jump across the angle between the extenvsion flange and the box wall.

I have removed this difficulty by curving the upper wall of the slot outwardly adjacent its outer edge, tli'e curve being so designed that when the i'oller reaches the point where the walls of the slot are approximately horizontal, as shown in Fig. 4 of the Garrett patent, the upp'erwall of the slot will contact with the upper side of the extension flange only adjacent its outer edge, and the continued descent of the box and consequent f rotation of the rollers will roll the upper wall of each slot inwardly over the extension edge under the resilient pressure afforded by the buffer, the outer edge of the slot being so Shaped that the tangents to the curved wall and the outer curve of the roller at their intersection areY at approximately a right angle, or, stated in another way, a plane Vthrough the axis of the roller and the outer edge of the curved portion of the wall will be tangent to the curved portion at its edge. Consequently, thisl edge is'adapted to press the wrappei' firmly and smoothly into the junction between the extension flange and the side wall and to produce a sharp, clean cut right angled bend in the wrapper. Y

Other objects and advantages of` my invention will be apparent from the following description taken in connection with the accompanying drawings, in which Fig. 1 is an end view of my' invention ap-` plied to a box covering,machine ofthe type disclosed in the Smith patent, showing part of thel support forthe rollers, the box, ad-

jacent supporting parts ofthe machine andA portions of the box shell, wrapper and supporting parts, showing the successive steps in the operation of applying the wrapper to the extension flange.

The box shell 10 is glued to an extension` bottom 11 having' ak flange 12 projecting beyond the side walls of the box 10.` 1A wrapper 13 cut to the proper shape is coated on one side with adhesive and the extension bottom 11 is placed thereon in proper posireciprocatingv plunger 16 is located inside they box shell;v and `the combined actionof the form block and platen maintains the box in position during the wrappingoperation. A`

pair of` oppositely located parallel wrapl ping rollers 17 extend into the path of the extension flanges l12 and the adjacent edges of platen 14, which is dimensioned so as to register accurately with Athenedges of the extension bottom 11. Rollers 17 are mounted kin any suitable way, such asby yoles 18 Yet! the frame of the wrapping machine. LEach ,Y

roller is provided with a diametrically located longitudinal slot 19 of substantialy width. In this slot is resiliently mounted a buffer element, preferably Vconsisting of a longitudinal rod 20 slidable transversely in the slot. Any desired method of mount-`v ing may be provided,'such as the screw studs of the Garrett patent,lsprings21 being Vinserted between the i'od and thel bottom of the slot to force it normally outward. The outer face ofthe rod 2O is beveled' at 22 to ioa formjwhatV may be referred to as a cam surface, tending to press the uppeiwall 23 of the slot resiliently against the upper surface of the extension flange when the down-vvv ward motion of the box introduces the flange Vinto the slot in the manner above described.

The method of operation of the roller will be apparent from Figs. 2 to 5. The descend- I* ingextension flange first enters the slot, as shown inAFig. 2, the roller being provided with any resilient mounting, 'such that disclosed-in the-Garrett patent, tending' to maintain it in its upward` position shownV in said figure. Aslight descent of the box rotates the roller until the upper slot wall :.23

`contacts with .the edge of thefflange V12.

lFurther descent ofv the box willforce the i buffer rod 20 slightly inward, its'finclined f face, however, tending to keep the fia'nge'in constant yieldable contact with the upper wall23, such descent bringingy theportion.V v of wall 23 lying inward of its pointof contact with theV edge of flange 12 intogcontact with the upper surfaceof the flange, and wall 23 is'so curvedas at 2lthatfthis( iso Vcontact will provide a continuous rolling pressure which will force the wrapper 13 against the flange in avery even and ef- 7*.motion of the box downwardly, carrying wrapped fiange 12 out of theslot 19, will also roll the roller 17 upwardly in continuous contact with the side of the box, pressing the wrapper firmly in position and furnishing noopportunity for the roller face, or wall 23 of the slot, to leave the surface of the box from the time flange 12 first contacts with the wall 23 to the time when roller 1T passes above the upper edge of the box. Thile I have described the preferred forni of my invention, it will be apparent that certain modifications thereof and different ways of applying the same to accomplish its purpose are possible; and I do not consider my invention to be limited to the exact form herein disclosed; as it is commensurate with the scope thereof disclosed in the specification and indicated in the claims.

I claim:

1. In a machine for wrapping extension bottom boxes adapted to pass the box, bottom first, through wrapping mechanism, means operated by the passage of the boX to apply the wrapper to the upper face of the extension edge of the box bottom by substantially rolling pressure.

2. In a machine for wrapping extensionl bottom boxes adapted to pass the box, bottom first, through wrapping mechanism, a rotating element, means for revolving the element, and means carried thereby and actuated bythe revolution thereof to apply the wrapper to the upper face of the extension edge of the box bottom by substantially rolling pressure.

3. In a machine for wrapping extension bottom boxes adapted to pass the box, bottom first, through wrapping mechanism, a roller, means carried thereby actuated by the passage of the box to revolve the roller,

and means carried by the roller and actuated by the revolution thereof to apply the wrapper to the upper face of the extension edge of the box bottom by substantially rolling pressure.

4. In a machine for wrapping extension bottom boxes adapted to pass the box, bottom first, through wrapping mechanism, a roller having a longitudinal slot located in the path of the extension edge of the box bottom and adapted to receive said edge, means for rotating the roller, and means carried by the roller and actuated by the revolution thereof for applying the wrapper to the upper face of the extension edge by substantially rolling pressure. y 5. In a machine for wrapping extension bottom boxes adapted to pass the box, bottom first, through wrapping mechanism, a roller having a longitudinal slot adapted to receive the extension edge of the box bottom, and a curved outer portion of the upper wall of the slot adapted to engage the upper face of the extension edge.

6. In a machine for wrapping extension bottom boxes adapted to pass the box, bottom first, through wrapping mechanism, a roller having a slot in the path of the extension edge of the box bottom and adapted to be rotated by the engagement of said edge with the slot, the outer portion of the upper face of the slot being curved outwardly awayfrom the opposite face of the slot to provide a curved pressure surface adapted to apply the wrapper to the upper face of the extension edge by substantially rolling pressure, and means for maintaining the pressure surface in operative contact with thev upper face of said edge.

7. In a machine Yfor wrapping extension bottom boxes adapted to pass the box, bot- 

